CN102560239A - Production method of high-grade electrical steel product - Google Patents
Production method of high-grade electrical steel product Download PDFInfo
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- CN102560239A CN102560239A CN2010105971649A CN201010597164A CN102560239A CN 102560239 A CN102560239 A CN 102560239A CN 2010105971649 A CN2010105971649 A CN 2010105971649A CN 201010597164 A CN201010597164 A CN 201010597164A CN 102560239 A CN102560239 A CN 102560239A
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- rolling
- normalizing
- deformation
- hot
- hot rolling
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- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 229910000976 Electrical steel Inorganic materials 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 238000005098 hot rolling Methods 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 238000009749 continuous casting Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000005097 cold rolling Methods 0.000 abstract description 6
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000012467 final product Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 241000675108 Citrus tangerina Species 0.000 description 1
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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- Manufacturing Of Steel Electrode Plates (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a production method of a high-grade electrical steel product, which comprises the working procedures of smelting, continuous casting, hot rolling, normalizing, cold rolling and annealing, and is characterized in that a cold-state small-deformation rolling working procedure realized by a flattening uncoiling machine set is added between the working procedures of hot rolling and normalizing, the deformation is controlled to be 1-5 percent, and the surface roughness index of a flattening roller is 1.0-4.5 mu m. The process is simple and reasonable, and can promote the improvement of normalized structure and the further improvement of electromagnetic performance of the final product and avoid the surface defects of coarse surface grains and coarse core deformation grains after high-temperature heat treatment.
Description
Technical field
The invention belongs to the steel products production technical field, relate in particular to a kind of working method of high grade electric steel product.
Background technology
Handle to improve hot rolled strip original structure homogeneity through normalizing in the high trade mark products production of cold rolling electric and alligatoring is mingled with and two-phase, improve the favorable texture component, improve the product electromagnetic performance with this.As everyone knows, in the high trade mark products production, hot-rolled steel sheet surface is for waiting axle recrystallized structure, and the centre is a banded structure, and along with the raising of silicone content, the equiaxed structure ratio further reduces; Top layer equiaxed grain structure favorable texture component is far above heart portion banded structure, but conventional the hot-rolled sheet normalizing handled, and because of heart portion deformation quantity is big, recrystallize speed is high, cause whole normalizing after, favourable component reduces.Along with the increase of high trade mark product silicone content, the thick deformed microstructure of big grain structure of product subsurface or heart portion can produce surface " tangerine peel " defective or present ditch ridge shape " corrugation " defective in the back operation is handled, worsened product total quality index.
At present, high grade cold rolling non-oriented electrical steel production technique is generally: smelting-continuous casting (having induction stirring)-hot rolling-hot-rolled sheet normalizing-cold rolling-annealing.The method that solves surperficial corrugation defective comprises: in casting process, adopt induction stirring to improve the continuously cast bloom proportion of equiaxed grain; Before cold rolling, increase the hot-rolled sheet normalizing and handle,, reach the purpose of improving finished surface corrugation defective, but in actual production, can not address this problem fully sometimes, occur slighter corrugation defective sometimes through eliminating hot-rolled sheet Deformation structure.This corrugation defective influences the iron core pile pieces coefficient to a certain extent, influences electrical efficiency.
Summary of the invention
The objective of the invention is to overcome the deficiency that above-mentioned prior art exists; Under the situation that does not change operation before and after the existing product; Make full use of the platform of hot rolled strip uncoiling inspection; A kind of electromagnetic performance that can further promote product is provided, improves the working method of the high grade electric steel product of high silicon product surface quality.
The working method of the high grade electric steel product of the present invention is achieved in that this method comprises smelting-continuous casting and hot rolling-normalizing-cold rolling-annealing operation; Be characterized between hot rolling and normalizing operation, increasing the cold state small deformation amount rolling process of realizing by the unwinding unit together; Its deflection is controlled at 1%～5%, and the surfaceness index of smooth roller is 1.0～4.5 μ m.
The unwinding unit of uncoiling inspection usefulness is carried out in utilization of the present invention to coils of hot-rolled steel; The steel band that the back operation is handled through normalizing carries out the design and the control of smooth roller roll surface roughness of certain small deformation amount rolling technological parameter; Reach and improve the purpose that normalized structure improves the finished product electromagnetic performance, and obtain the good quality production surface quality.
The present invention makes hot-rolled steel sheet that certain extension and distortion taken place through small deformation amount rolling process, improves steel band skin stress state or further through work hardening steel band is carried out energy storage, promotes normalized structure to improve with this, and then promotes the finished product electromagnetic performance.
High grade cold rolling non-oriented silicon steel is owing to silicone content in the steel is higher, and recrystallize is difficult in the course of hot rolling, because the surface is out of shape difference with heart portion, hot rolling microstructure is inhomogeneous, and heart portion is a Deformation structure, and the surface is a part recrystallized structure.Find that through practice surperficial recrystallized structure magnetic property in production process subsequently is superior to Deformation structure of heart portion, and deformed grains is easy to cause surperficial corrugation defective.Under same case, Deformation structure of heart portion has higher energy storage, so heart quality award from the ministry elder generation recrystallize, heart portion recrystallization process is annexed surface structure.If surperficial first forming core annexation core structure will make product performance improve in the normalizing process.
Hot-rolled sheet small deformation amount is rolling, and is less during owing to distortion, in addition, because smooth roller surface irregularity further increases and is out of shape.Make to produce certain deformation in the more shallow scope of surface of steel plate, the energy storage increase has promoted the generation of normalizing recrystallize subsequently.Though heart portion also is a Deformation structure, certain recovery because temperature is higher, takes place in Deformation structure behind hot rolled coil, discharged a part of energy storage.
Rolling through axle crystal structures such as surfaces in small deformation amount with certain roughness roller, be able to lengthening deformation, increase the generation of deformed belt; The thick deformed belt of heart portion is able to further process energy storage, has created condition for forming more polycrystalline nuclear, promotes favourable tissue to generate and avoids inside and outside big grain structure to generate.
Technical scheme of the present invention need to be specially adapted to the hot rolling electrical steel strip raw material of normalizing processing, is particularly useful for the high silicon content steel grade; The present technique scheme can be depressed tension parameters or its combination measure of parameter or smooth power or front and back tensioning roller and realizes through adjusting smooth unit.
Technology of the present invention is simple, reasonable, adopts technology of the present invention can promote the improvement of normalized structure and the further lifting of the finished product electromagnetic performance, avoids the thick deformation crystal grain of top layer coarse grain and heart portion after high-temperature heat treatment, to produce surface imperfection.
Embodiment
Through embodiment the present invention is described further below.
It is C:0.003% that the present invention implements steel grades, Si:2.53%, and Mn:0.25%, P:0.10%, S:0.003%, Als:0.25%, surplus is iron and unavoidable impurities.Technologies such as rolling through converter smelting, the continuous casting that has induction stirring, hot rolling, small deformation amount successively, normalizing, cold rolling and annealing.Each one group of three roller tenslator before and after the rolling employing hot-rolled sheet of the described small deformation amount unwinding unit, its controlled variable is seen table 1.
Table 1 embodiment of the invention small deformation amount rolling technological parameter
Claims (1)
1. the working method of a high grade electric steel product; Comprise smelting-continuous casting and hot rolling-normalizing-cold rolling-annealing operation; It is characterized in that between hot rolling and normalizing operation, increasing the cold state small deformation amount rolling process of realizing by the unwinding unit together; Its deflection is controlled at 1%～5%, and the surfaceness index of smooth roller is 1.0～4.5 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105971649A CN102560239A (en) | 2010-12-17 | 2010-12-17 | Production method of high-grade electrical steel product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105971649A CN102560239A (en) | 2010-12-17 | 2010-12-17 | Production method of high-grade electrical steel product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102560239A true CN102560239A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105971649A Pending CN102560239A (en) | 2010-12-17 | 2010-12-17 | Production method of high-grade electrical steel product |
Country Status (1)
| Country | Link |
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| CN (1) | CN102560239A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457099A (en) * | 2018-11-09 | 2019-03-12 | 鞍钢股份有限公司 | Process method for improving electromagnetic performance of common oriented silicon steel |
| CN112359265A (en) * | 2020-11-16 | 2021-02-12 | 湖南上临新材料科技有限公司 | Small-deformation pretreatment method of non-oriented silicon steel for motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888112A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | High magnetic induction and high grad non-orientation electrical steel and its making process |
| CN101041222A (en) * | 2006-03-22 | 2007-09-26 | 宝山钢铁股份有限公司 | Cold-rolled non-oriented electrical steel and the method for preparing the same |
| CN101537425A (en) * | 2009-04-21 | 2009-09-23 | 北京冶金正源科技有限公司 | Cold rolling process of stainless steel plate with frosted surface |
-
2010
- 2010-12-17 CN CN2010105971649A patent/CN102560239A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888112A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | High magnetic induction and high grad non-orientation electrical steel and its making process |
| CN101041222A (en) * | 2006-03-22 | 2007-09-26 | 宝山钢铁股份有限公司 | Cold-rolled non-oriented electrical steel and the method for preparing the same |
| CN101537425A (en) * | 2009-04-21 | 2009-09-23 | 北京冶金正源科技有限公司 | Cold rolling process of stainless steel plate with frosted surface |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457099A (en) * | 2018-11-09 | 2019-03-12 | 鞍钢股份有限公司 | Process method for improving electromagnetic performance of common oriented silicon steel |
| CN109457099B (en) * | 2018-11-09 | 2020-06-23 | 鞍钢股份有限公司 | A kind of process method for improving the electromagnetic properties of ordinary oriented silicon steel |
| CN112359265A (en) * | 2020-11-16 | 2021-02-12 | 湖南上临新材料科技有限公司 | Small-deformation pretreatment method of non-oriented silicon steel for motor |
| CN112359265B (en) * | 2020-11-16 | 2021-10-26 | 湖南上临新材料科技有限公司 | Small-deformation pretreatment method of non-oriented silicon steel for motor |
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Application publication date: 20120711 |